rdb f986f8de1b showbase: add back clampScalar and PriorityCallbacks to PythonUtil
These were removed by 88dbb31daa02779405ef5326677eefb5cf93f3c8 under the assumption that they were not used, but it has recently come to my attention that there is still code out there that uses these.

PriorityCallbacks has been updated to be compatible with Python 3 by only comparing the priority, rather than the (priority, callback) tuple. This also has the side-effect of ditching the bisect dependency.

Also moves testing code from the source to the unit tests.
2018-04-21 11:43:46 +02:00
..